[skip ci]Improve code style (#9918)

Signed-off-by: sunby <bingyi.sun@zilliz.com>

internal/datacoord/session.go

@@ -8,6 +8,7 @@
 // Unless required by applicable law or agreed to in writing, software distributed under the License
 // is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 // or implied. See the License for the specific language governing permissions and limitations under the License.
+
 package datacoord
 
 import (